No provision of this article shall authorize any person to violate any law or any rules or regulations adopted and promulgated thereunder, the administration and enforcement of which are assigned to the Department of Natural Resources or any division thereof or to the Coastal Marshlands Protection Committee. This article shall not be construed as repealing, preempting, modifying, or limiting the authority or functions assigned to the Department of Natural Resources or its divisions or officials or to the Coastal Marshlands Protection Committee.